Reversible sliding sash window



March 17, 1936. w RAUCHBAAR I 2,034,206 T REVERSIBLE SLIDING SASH WINDOW QIITEIIQ Filed June 8, 1934 M VENT? (l Qvma I ATTORNEY Patented Mar. 17, 1936 UNITED STATES PATENT OFFICE REVERSIBLE SLIDING SASH WINDOW Wilhelm Rauchbaar, Frankfort-on-the-Main- West, Germany Application June 8, 1934, Serial No. 729,592

In Germany June 9, 1933 Claims.

The invention relates to reversible sliding sash windows and comprises a device for securing the outwardly swung sash from sliding out of the outwardly swung position and locking position,

5' for example for securing it from rapid upward movement due to overtilting and the pull of the counterpoise cord.

Devices of this kind are already known. For example, it has already been proposed to provide on the window frame, in the vicinity of the bottom member, a securing device in which a looking hook, spaced from a tilt pivot, bears on a rail-guided abutment member when the window is swung out. Furthermore, it is known to provide the window frame bottom member and case frame bottom member with equivalently constructed notched attachments, or to provide,at the lower end of the sash guide grooves in the case frame, a transverse recess into which a guide pin, provided on the sash, slides in a positive manner in the lower position of the sash. For this purpose,it is necessary that the sash frame, on reversal, should bear against a cross bar. As a modification of this, a pivot is provided near the 25' lower edge of the sash, in addition to the guide pin, both the pivot and the pin coacting with curved recesses or with a suitably formed cam plate on the lower end of the sash guide grooves.

0n the assumption of providing an advantageous 30' further development, the two pins, guided only loosely and in one point, are combined to form one pin of substantially double the width.

It has been found that when only one pin is provided, additional members, for example resilient members, have to be provided in order to secure the outwardly swung position. Furthermore, in order to avoid jamming effects which impede the movement, it is necessary so to shape the transverse recesses at the end of the guide grooves that the danger of overtilting and rapid upward movement of the outwardly swung sash is practically unavoidable. These disadvantages are also possessed by the construction with combined pin and pivot. In addition, due to the combining of the pins and the resulting increase in guiding surface and sliding friction, the danger of jamming in the guide grooves or at the edges of the grooves and in the cam plate is very high. Easy manipulation accompanied however with exact guiding cannot therefore be attained. In addition, a considerable disadvantage is that even a slight stoppage or filling up of the latch recesses, for example with wood shavings or sawdust and the like, renders doubtful the predetermined guiding of the double pin, so that the latter jams and fects of forces, for example the effect of the weight of the sash (overtilting) and the pull of the counterpoise cords (rapid upwardly movement).

The device according to the invention eliminates in a simple and advantageous manner all the difiiculties and drawbacks enumerated in the foregoing. It consists substantially of two tilting and sliding pins projecting perpendicularly from the window frame lateral member, and a slotted cam plate on the case frame lateralmember for guiding the said pins. The device is characterized by the fact that the pins, constructed in the form of rollers and mounted in spaced relationship on a corner reinforcement of the frame, one of the said pins serving as means for fixing the counterpoise cord, are secured in each position from unwanted movements, for example from sliding out, by means of a cam plate having three cams.

The arrangement of the cams on the guiding cam plate according to the invention is such that the two outer cams project towards the opening of the plate. The effect of the arrangement of the cams is that, on the reversal of the window, both pins are guided substantially positively along the cams or the corresponding latch recesses, until at a predetermined position, the two rollers,

' which rotate about a common pole, are prevented from further movement by the middle cam and one of the two outer cams. The outwardly swung window is thus provided with a secure end position protected from all effects of forces; for example rapid upward movement of the sash is impossible.

The construction of the pins in the form of rollers is effected according to the invention in such a manner that the stationary inner pins are provided with loosely rotatable shells surrounding them. The advantageous effect of the use of rolling friction is that danger of jamming is reduced to a minimum, the edges of the grooves and the cam surfaces are protected, and more particularly, the pins, in being guided by the cam plate, hug the latter smoothly and are closely embraced thereby without any obstruction. This in particular enables the window sash to be swung out in a manner free from vibration, shock and jamming. Furthermore, in the event of a sudden downward movement of the window sash, caused for example by the breaking of a counterpoise cord, the rolling friction prevents damage to the window by the pin and pivot, since the loosely rotatable shells of the latter reduce the effect of the shock in known manner.

' 'Advantageously, an extension pin, to which the 5 cord may be fixed if desired by means of a suitable eye, is provided on the pivot situated nearest to the bottom end of the sash. The frame corner reinforcement,on which the rollers are mounted, preferably consists of a flat iron angle member.

10 If desired, the positive guiding of the pins may also be assisted, to a certain extent with relief of load, by means of the lower edge of the sash bearing against a transverse member, for example of the window frame.

15 If the weight of the window sash is particularly great, resulting in excessive stress on the securing device according to the invention, it is advisable to provide an additional securing means for instance on the case frame side member. Advan- 20 tageously, this means is actuated by the window sash itself, when the latter is swung outwardly.

V The said means consists of a stop projecting into the plane of the window sash movement, for example'in the form of a bolt or other suitably 25;, formed pin, for example with a rubber covering or the like, which is carried along by the sash until it is prevented from further movement at a stop or at the end of a slot guide, and hence holds the window in the predetermined position.

3Q Preferably the said Window holding means is fixed to a lever arm which is pivotally mounted on or in the case frame and is also swung outwardly, for example against the action of a spring, by being driven by the pin projecting 355 into the path of rotation of the window.

"If desired, this device may also be provided with'means for fixing it in any intermediate positions, for example plug-in pins, a notched guide or the like.

3 In the end position, by bearing on the cam, the sash is then in addition held caught to a certain extent by the said cam. Advantageously movement of the supporting lever in the direction for the position of use is effected against spring 55: action.

A form of construction of the invention is shown by way of example in the accompanying drawing, in which:-

Figure 1 shows a vertical section through a sliding sash window with the device.

Figure '2 shows in perspective a lower comer of the sliding sash window frame.

, Figure 3 shows, in a portion of the case frame, the holding means described in the foregoing in 5 the inoperative position. 7

Figure 4 shows the said device in the outwardly-swung position.

Referring to the drawing, I and 2 are the sliding sash guide grooves, 3 is the window sash, and

b 4 is the weather board on the case frame 5. The lower transverse bar of the sliding sash window is shown at 6; and-1 and 8 are the pivot and guide pin, both provided with loosely rotatable shells.

, At 9 is shown an extension of one of the pins for g'gl'fixing the cord. The plate I.0 protects the recesses of the case frame from wear, which recesses, if desired, are congruently constructed 7 accordingjto the invention. The plate may be fixedby means of screws, hooks, nails or the like 5 m any desired manner. By suitable configuration of the cam or cam surfaces, the'desired position of swing of the window can be obtained without trouble.

The lever arm I I, which is provided in the case frame and is pivoted at its lower end, carries at its free end a pin l2 which is mounted on the outer side face of the said lever arm and projects out of the slot M of the frame into the path of rotation of the window. As soon as the window is swung outwardly it takes the pin l2 with 5 it and hence moves the lever I I against the action of the spring l3 to a predetermined end position, the window bearing on the ,pin I2 and, being thereby held in the horizontal position shown in the figure. 10

The mode of operation of the device is as follows:

The window, in the lowermost position, is swung out of the vertical position after releasing suitable latching means, so that the guide pins can slide along the cam surfaces with rolling friction, the direction of movement being thereby secured and the limiting of the inclined position of the sliding sash window being also secured by finally bearing on projecting noses specially provided for the purpose. Automatic sliding out ofthe looking position, over-tilting, and the resulting rapid upward movement of the window sash is impossible.

The construction and arrangement of 'pin and pivot in combination with the configuration-of the cam plate adapted to such construction and arrangement render possible not only a vertical movement which is convenient to carry out, but

also easy and secure outwardly swinging and securing of the sash in the predetermined position.

I claim:-- V 1. Position securing means for sliding andtilting sash windows, in which two'pivots are provided on each of the lateral frame members of*'3 the window part to be tilted and are inserted in the slot of a guide plate on the lower endof the case frame and, entering widened portions of the slot, hold the window in the tilted position, char acterized in that the pins are mounted in the 40':

form of rollers on a member of a corner reinforcement angle piece for the window frame and the holding plate on the case frame is constructed in" the form of a cam plate having three cams, and

on the case frame lateral member, a supporting lever, mounted in the manner of a folding knife,.. is adapted to be swung outwardly against a resistance, and is provided with a supporting part.

2. Position securing means for sliding and tilting sash windows, in which two pivots are provided on each of the lateral frame members of the window part to betilted and are inserted in the slot of a guide plate on the lower end of the case frame and, entering widened portions of the,

slot, hold the window in the tilted position, char-- acterized in that the pins are mounted in the form of rollers on a member of a corner reinforcement angle piece for the window frame, and' the holding plate on the case frame is constructed in the form of a cam plate having three cams, the two outer ones of said cams projecting towards the opening of the slot in said plate, and on the case frame lateral member, a supporting lever, mounted in the manner of afoldingknife,

is adapted to be swung outwardly against a resist- 65.

ance and is provided with a supporting part,

3. Position securing means for sliding and tilting sash windows, in which two pivots arep'rovided on each of the lateral frame members of the window part to be tilted and are inserted in the slot of a guide plate on the lower end of the case 1. frame and, entering widened portions-of the slot-, hold the window in the tilted position, characterized in that the two pins are mounted in the form of rollers on a member of a corner reinforcement;

angle piece, the roller pin situated nearest the corner is extended beyond the roller and is constructed as an attachment for a counterpoise cord fixing means and the holding plate on the case frame is constructed in the form of a cam plate having three cams and on the case frame lateral member a supporting lever, mounted after the manner of a folding knife, is adapted to be swung outwardly against a resistance and is provided with a supporting part.

4. In a tilting device for sash windows, the combination comprising a tiltable window sash, a case frame for said sash, a pair of rollers rotatably mounted in spaced relationship on each side of said sash, a guide plate for each pair of rollers secured to the lower end of said case frame, a slot in said guide plate having a widened portion, and three cams arranged in said slot, said cams being adapted to be engaged by said rollers and to hold same in position and locked against upward displacement when said rollers enter the slot in said guide plate and when the said sash is tilted, and auxiliary means for supporting said sash in its tilted position, said means including a springheld lever pivoted in the window frame, an adjustable stop for said lever and a member at the far end of said lever protruding into the path of the tilted window sash whereby said lever will be automatically actuated and said protruding member will engage and support said window sash when the same is tilted.

5. In a tilting device for sash windows, the combination comprising a tiltable window sash, a case frame for said sash, a pair of pins mounted in spaced relationship on each side of said sash, a guide plate for each pair of pins secured to the lower end of said case frame, a slot in said guide plate having a widened portion, and three cams arranged in said slot, said cams including curvilinear surfaces adapted to substantially simultaneously engage and to positively guide said pins when tilting the said sash, and a nose at the end of each of said surfaces to arrest the movement of said pins in a predetermined end position of said sash.

WILHELM RAUCHBAAR. 

